6) Use a significance level of a = 0.05 to test the claim that u 32.6. The sample data from normal population consists of 15 scores for which x = 41.9 and s = 7.7.

Suppose IQ scores were obtained for 20 randomly selected sets of twins. The 20 pairs of measurements yield x=97.85​, y=98.95​, r=0.871​, ​P-value=​0.000, and y=17.2+0.84x​, where x represents the IQ score of the twin born second. Find the best predicted value of y given that the twin born second has an IQ of 104​? Use a significance level of 0.05. The best predicted value of y is ?

In a study of store checkout​ scanners, 1234 items were checked and 21   checked items were overcharges. Use a 0.05 significance level to test the claim that with​ scanners, 1% of sales are overchanrges.​ (Before scanners were​ used, the overcharge rate was estimated to be about​ 1%). a. Define the parameter     A. p​ = The proportion of all sales that are incorrect   B. p​ = The proportion of all sales that are overcharges   C. mu   ​= The mean number of sales that are overcharges   D. mu   ​= The proportion of all sales that are undercharges   b. State the null and alternative hypotheses     A. Upper H 0 : p equals 0.01 Upper H 1 : p not equals 0.01     B. Upper H 0 : p equals 21    Upper H 1 : p less than 21     C. Upper H 0 : p greater than 0.01 Upper H 1 : p equals 0.01     D. Upper H 0 : mu not equals 0.01 Upper H 1 : mu equals 0.01     c. Calculate the sample proportion ModifyingAbove p…

Suppose IQ scores were obtained for 20 randomly selected sets of siblings. The 20 pairs of measurements yield x=103.36​, y=103.45​, r=0.928​, ​P-value= 0.000, and y=−7.2+1.07x​,where x represents the IQ score of the older child.Find the best predicted value of y given that the older child has an IQ of 106? Use a significance level of 0.05

Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of measurements yield x=102.2​, y=100.8​, r=0.854​, ​P-value=​0.000, and y=24.13+0.75x​, where x represents the IQ score of the wife. Find the best predicted value of y given that the wife has an IQ of 95​? Use a significance level of 0.05.   LOADING... Click the icon to view the critical values of the Pearson correlation coefficient r. The best predicted value of y is nothing.

Suppose IQ scores were obtained for 20 randomly selected sets of siblings. The 20 pairs of measurements yield x=100.3​, y=101.75​, r=0.901​, ​P-value=​0.0001, and y=−7.33+1.09x​, where x represents the IQ score of the older child. Find the best predicted value of y given that the older child has an IQ of 90. Use a significance level of 0.05.

Reports show that 92% of online searches in March 2021 use Google as the search engine. A network administrator wants to determine whether the percentage of searches that use Google is different in their company. They sample 800 searches and find that 758 of them use Google. Can they conclude that the percentage of searches that use Google in this company differs from 92%? Use the a = 0.05 level of significance.

M&M Candy Colors. Mars, Inc. manufactures M&M’s, one of the most popular candy treats in the world. The milk chocolate candies come in a variety of colors including blue, brown, green, orange, red, and yellow. The overall proportions for the colors are .24 blue, .13 brown, .20 green, .16 orange, .13 red, and .14 yellow. In a sampling study, several bags of M&M milk chocolates were opened and the following color counts were obtained. Use a .05 level of significance and the sample data to test the hypothesis that the overall proportions for the colors are as stated above. What is your conclusion?

Suppose IQ scores were obtained for 20 randomly selected sets of siblings. The 20 pairs of measurements yield x = 98.67, y = 99, r= 0.930, P-value = 0.000, and %3D y = - 12.38 +1.13x, where x represents the IQ score of the younger child. Find the best predicted value of y given that the younger child has an IQ of 97? Use a significance level of 0.05. Click the icon to view the critical values of the Pearson correlation coefficient r. The best predicted value of y is (Round to two decimal places as needed.)

Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of measurements yield x=100.74​, y=103.1​, r=0.906​, ​P-value=​0.000, and y=12.63+0.9x​, where x represents the IQ score of the husband. Find the best predicted value of y given that the husband has an IQ of 105​? Use a significance level of 0.05.